Winter turning, by Tui T. Sutherland

Winter has been a disappointment to his royal IceWing family, unlike his sister Icicle, who has been raised to challenge IceWing queen--but now that Icicle has broken the truce and escaped from Jade Mountain Academy, so Winter, accompanied by his new clawmates, Moon, Qibli, and Kinkajou, embarks on his own quest to free his brother from the clutches of Queen Scarlet, and win the respect of his family

Winter has been a disappointment to his royal IceWing family, unlike his sister Icicle, who has been raised to challenge IceWing queen--but now that Icicle has broken the truce and escaped from Jade Mountain Academy, so Winter, accompanied by his new clawmates, Moon, Qibli, and Kinkajou, embarks on his own quest to free his brother from the clutches of Queen Scarlet, and win the respect of his family

Winter has been a disappointment to his royal IceWing family, unlike his sister Icicle, who has been raised to challenge IceWing queen--but now that Icicle has broken the truce and escaped from Jade Mountain Academy, so Winter, accompanied by his new clawmates, Moon, Qibli, and Kinkajou, embarks on his own quest to free his brother from the clutches of Queen Scarlet, and win the respect of his family